Hot-air-conductor pipe.



C. J. HOLUB.

HOT AIR CONDUCTOR PIPE.

APPLICATION FILED FEB.2,1914.

Patented Dec. 29, 1914.

HE NORRIS PETERS 60.. PHUTO-LITHCL. WASHINGTON. D C

looking elements.

*nnrrnn sraips r agranr onnron- CHARLES J. HOLUIB, OF NEWPORT, KENTUCKY, ASSIGNOB TO THE "WIl'.LLIAIVLEEOIQ HEATER-COMPANY, OF CINCINNATI, OHIG, A CORPORATION 0F OHIO.

HOT-AIR-CONDUGTOR PIPE.

Specification of Letters Patent. P t nted Dec. 29,1914.

Application filed February 2,1914. Serial No. 815,897.

To aZZ whom it may concern:

Be it known that 1, CHARLES J. HOLUB, a

citizen of the United States, and residing at Newport, in the county of Kenton and State of Kentucky, have invented a new and Improved Hot-Air-Conductor Pipe, of which the following specification is a full disclosure.

This invention relates to an improvement in sectional pipes, and primarily to that class known as hot-air conductor pipes used in connection with furnaces for heating purposes.

The object of this invention is to provide means, for locking two sections of pipe together at their meeting or telescoping ends.

Another object is to provide a snap-lock for sectional hot-air furnace pipes stamped from the body portion of the pipe and so formed that an ordinary wire nail may be used as a locking or binding medium.

Other novel features of construction and arrangement of parts aremade apparent by the accompanying drawings, which, while illustrating a preferred form of embodiment of this invention, are only intended to present to those skilled in this art the underlying principles thereof, that they may employ them in the numerous modifications contemplated within their scope. These drawings have been annexed as a part of, this disclosure, like characters of reference" denoting corresponding parts throughout the several figures of which Figure 1 is a perspective view of the lower end of a pipe length showing one of the Fig. 2 is a perspective view of the upper end of a companion pipe section showing a second locking element adapted to register with that shown in Fig. 1. Fig. 3 is a fragmentary perspective view of both sections showing the looking elements inter-meshed and the locking member in engagement therewith. Fig. 4 is a detailed section through the marginal ends of the jointed ends of the sections and locking elements.

Continuing now to describe the illustrated adaptation of this invention, it will be preliminarily stated that while I have shown rectangular hot-air conductor piping of double wall formation, of a type having an intermediate air space, it is obvious that my improvement is equally adaptable to a sin-v gle walled pipe of any contour.

A, B, represent pipe sections or lengths having their end aranged to be telescopically intermeshed, with each section formed of inner and outer walls 1,2, respectively, lnclosing an intermediate air space. The

walls 1, 2, of each section are united at: their ends; at one end the outer wall 2 tapering toward the innerwall 1, and at the other end the inner wall 1 tapering toward the outer wall 2. Near the lower edge of the pipe section A, (see Fig. 1),.is formed an aperture 3, said section having countersunk surfaces forming'opposing tapered recesses f at either side thereof. Near the top of the pipe section B, (see Fig. 2) at a position adapted to register with the aperture 3 of the section A, when said sections are intermeshed, is a hollow head or eye 5, punched I outwardly from the side wall 2, said wall at either side of said eye having countersunk recesses '6 similar in form to and adapted (when the sections areintermeshed) to register with, the recesses 4 of the companion section. j

When two sections of pipe are united (see through the aperture 3 of the companion section. During this uniting of the sections the lower edge of the section A will, by reason of the natural spring of the metal snap over the eye 5, constituting what may be termed a snap-lock, needing only a binding or locklng member to make a positive lock. To look the sections together I forcibly thread an ordinary'wire nail 7 beneath the eye 5, leaving the ends projecting on either side thereof and frictionally bearing against the side wall. The crown of the eye 5 is approximately in the same plane as the outer surface of the side wall, the countersunk tapered recesses permitting the threading of the nail beneath the eye 5 and the natural spring of the nail or tie rod 7 pro.-

viding frictional resistance against withdrawal. It 1s obvious that a piece of spring wire or rod may be substltuted for the nail,

so Fig. 3) the eye 5 of one section'projects,

therefore I do not wish to limit myself to the use of a nail as a binding element.

The countersunk surfaces of the apertured or outer section adjacent the open ends of the projecting eye, constitute guides for the tie rod, enabling its ready insertion through the eye, and also serve so to limit the projection of the locking elements that they lie approximately flush with the plane surface of the outer pipe section.

Having described my invention, 1 claim 1. A device of the class described, combining two sheet metal pipe sections to be telescopically united in a tight fitting joint, the margin of the inner fitting section being formed with a struck-up eye and countersunk adjacent the edges of said eye, the corresponding margin of the other section being apertured and correspondingly countersunk, said margins being relatively resilient enabling the eye to snap through said aperture when the section ends are appropriately telescoped.

2. A device of the class described, com binin g two sheet metal sections telescopically united in a tight fitting joint, the margin of the inner fitting section being formed with a struck-up eye and countersunk ad jacent the ends of said eye, the corresponding margin or" the other section being apertured and correspondingly countersunk with said eye projecting outwardly through the same and a tie inserted through said eye and held in wedging engagement relative to said countersunk surface.

3. A device of the class described, combining two sheet metal pipe sections to be telescopically united in a tight fitting joint, the margin of the inner fitting section being formed with a struck-up eye extending parallel with the joint, the metal surface adjacent the open ends of tie eye being countersunk, the corresponding margin of the outer section being apertured, and correspondingly countersunk, and a tie inserted through the projecting portion of said eye and held in wedging engagement relative to said outer countersunk surface.

4:. A device of the class described combining two sheet metal pipe sections telescopically united in a tight fitting oint, the overlapping joint margins being formed respectively with an interlocking aperture and eye and countersunk acent the aperture and the open ends of the eye and a tie inserted through the eye and retained in wedging relation with the margin surface.

5. A sectional conductor pipe, comprising two sections having an aperture at one marginal end of each section. and provided with countersunk surfaces, an eye stamped outwardly from the body portion of the opposite marginal end of each section adapted to intermesh with the aperture of an adjacent section when the sections are telescopically united and an independent locking tie rod adapted to be threaded beneath the eye to lock the sections together.

6. A sectional conductor pipe, comprising two sections having an aperture at one marginal end of each section, an eye stamped outwardly from the body portion of the opposite marginal end of each section, adapted to intermesh with the aperture of an adjacent section when the sections united, said eye being approximately in the same plane as the outer surface of the apertured end, the apertured end being provided with countersunk opposing recesses adjacent the aperture, and a tie rod adapted to be threaded through said eye and frictionally held in looking position.

7. A se tional conductor pipe, comprising two sections having an aperture at one marginal end of each section, an eye stamped outwardly from the body portion of the op posite marginal end of each section adapted to intermesh with the aperture of an adjacent section when the sections are united, a tie rod for the eye, the crown of said eye extending beyond the outer surface of the apertured end a distance, less than the thicln ness of the tie rod, said apertured end heprovided with countersunk recesses adj acent the aperture permitting the tie rod to be threaded through said eye to and frictionally held in looking position.

8. A device of the nature disclosed comprising two sheet metal pipe sections to be telescopically united in a tight fitting joint, the margin of the inner fitting section being formed with a struck-up eye and the corresponding margin of the outer fitting section being apertured, the marginal surface adjacent said struck-up eye being shaped to enable the insertion of a tie rod through the eye and to hold the rod in wedging engagement relative to the eye and the apertured section.

in witness whereof, I hereunto subscribe my name, as attested by the two subscribing witnesses.

CHARLES J. HOLUB.

lll'itnesses (haven B. KAIsnn, LOUISE A. BECK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. (3. 

